Vacuum cleaner



Nov. 10, 1925. 1,561,321

M. GOODMAN VACUUM CLEANER Filed April 25, 1924 IIIIIIIIIIIIIIIIIIIIIIIIIIIIH K L INVENTOR r A I \a wmvzss ES: if H Milton Goodman Putented Nov. 10,1925.

UNITED STATES MILTON GOODMAN, OF NEW'YORK, N. Y.

vacuum CLEANER.

Application filed April 25.

, To all whom it may concern:

Be it known that I, MILTON GOODMAN, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Vacuum Cleaner, of which the following is a full, clear, and exact description.

This invention has relation to vacuum cleaners and refers more particularly to an improvement in the same whereby to increase the efiiciency thereof.

In the present construction of vacuum cleaners now in general use, it has beenobserved that the continuous flow of the suction draft through the intakemouth of the suction nozzle does not as effectually lift and remove the dust, dirt or other foreign matter from the surface being cleaned as where the suction draft is interrupted so that the surface being cleaned is subjected to intermittent pufis of suction draft.

It is, therefore, the outstanding object of the present invention to associate with a vacuum cleaner, a means for periodicallyor intermittently interrupting the suction draft through the intake mouth of the suction noz 21s for the above mentioned purpose.

As a further object the invention contemplates in connection with a vacuum cleaner which includes a suction nozzle having an intake mouth and a chamber communicating with the opposite end of the suction nozzle provided with means for expelling the air therefrom for creating a partial vacuum thereln, a mechanism for intermittently cuting oficommunication between the suction nozzle and the vacuum chamber whereby the partial vacuum is greatly increased or the airpressure within the vacuum chamber is decreased intermittently or periodically whereby when the mechanism reestablishes communication between the vacuum chamher and the suction nozzle an increased suction draft is created in the said nozzle.

As a still further object the invention comprehends an improvement in vacuum clean- 1 ers which does not materially increase the cost. of production, which is extremely simple in itsconstruction, and which is highly eflicient in its purpose. Y a

With the above reci I .d and other objects in view, the invention resides ,in the novel construction set forth in the followingsppgzi: fication, particularly pointed out in the apter bein vided wlth 1924. Serial to. 709,010.

tion being taken approximately on the line indicated at 11 in Fig. .2;

Fig. 2 is a transverse sectional view taken approximately on the line indicated at 2'-2 in Fig. 1.

j Referring to the'drawings by characters of reference, 10 designates the suction nozzle of a vacuum cleaner having an intake mouth 11 and a discharge mouth 12 which extends into and communicates with a vacuum chamber 01' compartment L3 defined by a housing 14. A suitable fan or other air expelling means 15 is mountedlon and secured to a. drive shaft16 which is connected with a motor, not shown, but contained in a motor housing 17. When the fan 15 is rotated, it operates to create a. partial vacuum in the vacuum chamber 13 whereby a suction draft is created in the nozzle 10 todraw the dust,

'dirt or other foreign matter through the inconnectedwith the motor shaft 16 for intermittently or periodically closing or cutting off communication between the suction nozzle and the vacuum chamber 13. As specifically illustrated, the shutter 18 is of circular or disk-like formation and is rovided with an arcuate opening 19, said utmounted on a'shaft 20 and rolperipheral gear teeth 21 w ich mesh with t e teeth of a pinion 22 mounted on acounter shaft 23. The counter shaft 23 has secured thereto a pulley 24 and the motor shaft 16 has secure thereto a pulley 25 around which pulleys a belt 26 is trained whereby the counter shaft is driven from the I motor shaft coincidentalgy with the driving of the fan 15. As the utter 18 registers with the discharge end 12 of the nozzle, communication is. cut off between the vacuum chamber 13 and the suction nozzle 10 and it will, of course, be appreciated that the expulsion of air from the chamber while the shutter is in closed relation, tends to build up or increase a partial vacuum or in other words decrease the air pressure so that when the opening 19 of the shutter registers with the discharge end of the nozzle an increased suction draft is created in the nozzle. This serves to intermittently or periodically subject the surface being cleaned to puffs of suction draft whereby the cleaning action is more effective than where the suction draft is steady or continuous.

It is, of course, understood that the particular means shown for periodically interrupting the suction draft through the-suction nozzle is merely illustrative of one means which may be employedand that no restriction or limitation is intended by the mechanism thus shown.

Iclaim: v

1. In a vacuum cleaner including a suction nozzle,a chamber communicating with the nozzle and having means therein for creating a suction draft through the nozzle. and mechanism co-operating' with the point of communication between the nozzle and chamber, said mechanism being positively driven by the suction draft-creating means for periodically and completely cutting off communication between the nozzle and said chamber, whereby to subject the surface being cleaned to a succession of suction impulses.

2. In a vacuum cleaner including a fan chamber, a fan in said chamber, a suction nozzle connected thereto and communicating therewith, and means for operating the fan to produce a suction draft through the fan chamber and nozzle, of mechanism for periodically cutting 0E and establishing communication between the fan chamber and suction nozzle for subjecting the surface being cleaned to a succession of suction impulses, said mechanism comprising a shutter member mounted in the fan chamber and extending over the point of communication of the suction nozzle therewith,

said shutter member having an eccentric opening therein and operative'means of connection between the fan operating means and shutter for rotating-the same.

3. In a vacuum cleaner, a fan chamber, a fan therein for expelling the air therefrom, a suction nozzle having an intake mouth at one end and communicating at its opposite ed with the fan chamber, mechanism for intermittently closing said latter communicating end whereby to periodically interrupt the suction draft through the intake mouth of the suction nozzleand whereby to periodically increase the partial vacuum in said fan chamber when communication is cut off between the suction nozzle and fan chamber, and a common means for driving the'fan and said mechanism.

MILTON GOODMAN. 

